scholarly journals Структурные особенности замещенного феррита стронция Sr-=SUB=-1-x-=/SUB=-La-=SUB=-x-=/SUB=-FeO-=SUB=-3-delta-=/SUB=-: I. Sr-=SUB=-2-=/SUB=-LaFe-=SUB=-3-=/SUB=-O-=SUB=-9-delta-=/SUB=-

2021 ◽  
Vol 63 (10) ◽  
pp. 1648
Author(s):  
В.Д. Седых ◽  
О.Г. Рыбченко ◽  
Н.В. Барковский ◽  
А.И. Иванов ◽  
В.И. Кулаков
Keyword(s):  
Heat Treatment ◽  
Diffraction Analysis ◽  
Rhombohedral Phase ◽  
Structural Features ◽  
Structure Evolution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Temperature Range ◽  
Treatment Conditions ◽  
Valence States

The structural features and Fe valence states in the substituted strontium ferrite Sr2/3La1/3FeO3-δ (or Sr2LaFe3O9-δ) have been studied for different synthesis and heat treatment conditions by X-ray diffraction analysis and Mossbauer spectroscopy. A series of annealing of Sr2LaFe3O9-δ in vacuum ((10-3 Torr) in the temperature range of 400 - 650оС allowed us to trace the structure evolution from rhombohedral phase (Sr2LaFe3O9) to orthorhombic one (Sr2LaFe3O8) over the formation of intermediate multiphase states and the redistribution of Fe valence states as well.

Structure Evolution of Zirconium Alloys during Deformation/Heat Treatment

2004 ◽  
Vol 467-470 ◽  
pp. 489-494
Author(s):  
Sergey A. Nikulin ◽  
A.B. Rojnov ◽  
M.M. Peregud
Keyword(s):  
Electron Microscopy ◽  
Heat Treatment ◽  
Tensile Properties ◽  
Tensile Testing ◽  
Zirconium Alloys ◽  
Structure Evolution ◽  
X Ray Diffraction ◽  
X Ray ◽  
Treatment Conditions ◽  
Transmission Electron

Using transmission electron microscopy, x – ray diffraction analysis, tensile testing and fractography the changes were analyzed that occur in microstructure and tensile properties of E635 alloy annealed after quenching from b – region of phase diagram. The interrelation is demonstrated between microstructure and tensile properties depending on deformation/heat treatment conditions.

The Process of Sol-Gel Method Prepared Bi-2212 Superconductors Tapes

2013 ◽  
Vol 275-277 ◽  
pp. 2300-2303
Author(s):  
Gen Zong Song ◽  
Duo Zhang
Keyword(s):  
Heat Treatment ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Ni Substrate ◽  
Treatment Conditions ◽  
Drying Conditions ◽  
And Control

In this dissertation, Bi-2212 superconducting tapes was prepared by sol-gel method, in addition we mainly studied heat treatment conditions and sintering material drying conditions of the NiO/Ni substrate, and gived a optimization to the process. The heat treatment process of the NiO/Ni substrate had been researched.Based on previous experience, we explored the temperature of heat treatment and improved the process.Afterheattreatment,the samples was analyzed by metallographic microscope and X-ray diffraction,and we analysed these data. It’s concluded that the dense uniform oxide film can be sintered in 800°C with a 3 hours’ heat treatment.We further explored the conditions of the Bi-2212 superconducting materials.During the preparation. We mainly studied the drying temperature and sintering temperature ,because they would affect the gel phase transition and control components. It has a very important effect on high-quality superconducting strip preparation. Experiments results showed that drying the sample at 510 °C in temperature is best. all the samples was analyzed by X-ray diffraction. We summed up the data derived from experiments , it showed that sintering the sample at 850°C,we can obtain the mixed phase of Bi-2201 and Bi-2212.

Synthesis of nanocomposite coating of electrodeposed amorphic layers of the Ni–P–W system

2020 ◽  
pp. 53-60
Author(s):  
A. V. Krasikov
Keyword(s):  
Electron Microscopy ◽  
Heat Treatment ◽  
Differential Scanning Calorimetry ◽  
Phase Composition ◽  
Diffraction Analysis ◽  
Nanocomposite Coating ◽  
Nanocrystalline Phase ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray

The processes of the formation of the nanocomposite coating of Ni–11.5% P–5%W were studied during the heat treatment of amorphous electrodeposited layers. Using the method of differential scanning calorimetry, the temperature of the onset of crystallization of the nanocrystalline phase Ni3P was determined. X-ray diffraction analysis showed that heat treatment produces Ni3P phosphides and, presumably, Ni5P2, the size of which, according to electron microscopy, is 5–50 nm. The influence of the duration of heat treatment on the phase composition and microhardness of coatings is investigated.

Influence of Heat Treatment on the Structure and Performance of ATP and its Catalyzer

2011 ◽  
Vol 295-297 ◽  
pp. 1510-1515 ◽  
Author(s):  
Yue Bin Lin ◽  
Chun Bo Li ◽  
Yu Fu Zhu ◽  
Ai Hui Liu
Keyword(s):  
Heat Treatment ◽  
Thermal Analysis ◽  
Spectroscopic Analysis ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
X Ray ◽  
Treatment Conditions ◽  
Transmission Electron ◽  
Crystal Transition ◽  
And Performance

Taking Attapulgite Clay(ATP) as a carrier, TiO2/ATP precursor was prepared by acid sol-gel method, and then made its composite under different heat-treatment conditions. The structures, dimensions, compositions of the composite are characterized by X-Ray diffraction, transmission electron microscope, thermogravimetric-differential thermal analysis and spectroscopic analysis measurements, respectively. the results show that TiO2/ATP composite increase the crystal transition temperature of TiO2, rutile TiO2emerge in the composite until 800°C, ATP lost its layer constructure and collapse at 850°C.

Powder X-ray diffraction analysis of the ferroelectric liquid crystal with a 2-methylbutoxypropionate unit as a function of temperature

2003 ◽  
Vol 18 (4) ◽  
pp. 293-295 ◽  
Author(s):  
L. Dobiášová ◽  
H. Šíchová ◽  
V. Valvoda
Keyword(s):  
Liquid Crystal ◽  
Diffraction Analysis ◽  
Small Variation ◽  
Ferroelectric Liquid Crystal ◽  
X Ray Diffraction ◽  
Layer Spacing ◽  
X Ray ◽  
Temperature Range ◽  
Liquid Crystal Material ◽  
Intermolecular Distances

The ferroelectric liquid crystal material [4-[(4-methyloxyfenyl) carbonyloxyl] bifenyl-4′-yl]-(S)-2-methylbutoxypropionate containing a lateral methyl group on the aromatic ring of the alkoxybenzoate unit and two chiral carbons has been investigated by X-ray powder diffraction analysis at the 28 °C–105 °C temperature range. On cooling through the SmC temperature range, the layer spacing decreases from 28.3 to 27.7 Å with a small variation of average intermolecular distances. Lattice parameters of tetragonal and monoclinic crystalline phases occurring at lower temperatures have been determined.

scholarly journals Структурные, магнитные и тепловые свойства соединения Tb-=SUB=-0.8-=/SUB=-Sm-=SUB=-0.2-=/SUB=-Fe-=SUB=-2-=/SUB=- cо структурой фаз Лавеса

2019 ◽  
Vol 61 (12) ◽  
pp. 2471
Author(s):  
Т.А. Алероева ◽  
И.С. Терешина ◽  
Т.П. Каминская ◽  
З.С. Умхаева ◽  
А.В. Филимонов ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Wide Temperature Range ◽  
Room Temperature ◽  
Structural Features ◽  
Surface Topology ◽  
Magnetic Domains ◽  
X Ray Diffraction ◽  
X Ray ◽  
Temperature Range ◽  
Comprehensive Study

A comprehensive study of the structure, phase composition, features of the surface topology, the magnetostrictive and thermal properties of the Tb0.8Sm0.2Fe2 compound are performed. The structural features were established at micro- and nanoscale levels, and information on the magnetic domains structure at room temperature was obtained. The results of x-ray diffraction studies in a wide temperature range of 90–760 K, including Curie temperature, are represented. Experimental data on thermal expansion and magnetostriction in magnetic fields up to 12 kOe were obtained and analyzed. Anomalies were found in the thermal expansion curves dl/l (T) and magnetostriction λ (T) at low temperatures. It is established that in compound under study the value of the magnetostrictive effect remains almost unchanged in a wide temperature range 100–300 K in fields up to 3.5 kOe.

BISMUTH PARTIAL SUBSTITUTION EFFECT ON PROPERTIES OF THE Bi2Sr2Ca2Cu3OZ SYSTEM

2002 ◽  
Vol 16 (20) ◽  
pp. 769-774
Author(s):  
S. SIMON ◽  
R. V. F. TURCU ◽  
M. POP ◽  
Gh. BORODI
Keyword(s):  
Heat Treatment ◽  
Diffraction Analysis ◽  
Liquid Nitrogen ◽  
Substitution Effect ◽  
Liquid Nitrogen Temperature ◽  
Partial Substitution ◽  
Superconducting Properties ◽  
X Ray Diffraction ◽  
Static Susceptibility ◽  
X Ray

The effect of bismuth partial substitution by lead, cadmium or tin on the properties of the polycrystalline systems Bi 2-x M x Sr 2 Ca 2 Cu 3 O z (M = Pb, Cd or Sn) was investigated. The samples were obtained from amorphous precursors by heat treatment applied in several stages. X-ray diffraction analysis and static susceptibility measurements were carried out in order to characterize the structure and to check the superconducting properties of the investigated samples. Superconducting behavior above liquid nitrogen temperature was evidenced only for the partial substitution of Bi with x = 0.2 Pb and x = 0.1 Sn.

Microstructural evolution of Sn–Ag–Cu–Al solder with respect to Al content and heat treatment

2002 ◽  
Vol 17 (9) ◽  
pp. 2386-2393 ◽  
Author(s):  
Kwang-Lung Lin ◽  
Chih-Chun Hsiao ◽  
Kaug-I Chen
Keyword(s):  
Heat Treatment ◽  
Microstructural Evolution ◽  
Eutectic Temperature ◽  
Melting Behavior ◽  
X Ray Diffraction ◽  
X Ray ◽  
Al Content ◽  
Sn Whiskers ◽  
Treatment Conditions ◽  
Differential Scanning Colorimetry

The Pb-free Sn–Ag–Cu–Al solders were investigated for microstructural evolution with respect to Al% and heat treatment. The Al% varies from 0.1% to 0.45% while the contents of Ag are 3.1%–2.53% and of Cu are 0.41%–0.33%. Differential scanning colorimetry (DSC) was applied to identify the melting behavior. A monotectic temperature of 224 °C and a eutectic temperature of 220 °C are deduced from the DSC results. The microstructure was characterized with x-ray diffraction and scanning electron microscopy-energy dispersive spectroscopy. Ag3Sn and the γ2 phase of Al–Cu system are the intermetallic compounds formed in the as-cast solders. Cu6Sn5 formed upon heat treatment for 1000 h at 150 °C in the 0.45 Al-containing solder, while not found in the other solders or other heat treatment conditions. Sn whiskers were detected in a 0.45 Al-containing specimen after aging for 50 h.

Sign in / Sign up

Export Citation Format

Share Document